Anthracene compound and process of making same.



residing at Mannheim, Germany, have in-' "No Drawing.

PATENT oFFIoE.

FILIP'KACER, oF/MAnNH-snmcERMA y, AssIGuoR TOY-BADISCHE A1IILI1I.&1S0DA FABRIK, OF Lnnwr'GsHAFEN-oiv-wnn-nnmn, GERMANY, .a compan on or ADEN. y

anrrfi-imcnnn coMrouNn-A'Nn PROCESS or MAKING saris,

To all whom-it may concern;

Be itknown that I, FILIP KAGER, Ph. D., chemist, a subject of the King of Prussia,

vented new and usefullmprovements in Anthracene Compounds and Processes of Making Same, of which the following is a specific'ation The specification of German Patent No. 162,824 describes the production of compounds of the anthracene seri'es by condensing a ha-logenized anthraquinone derivative.

with an amino-anthra({uinone derivative,

and it is'stated'in the said specificationthat the new compounds are of use as arent materials for, the production of new 00 orlng ma .ters. have now discovered that a particularone of the compounds obtainable ac cording to the said specification, namely'2.2-

dimethyl-1.1-dianthraquinonylamin,- on be ing subjected ,to the action of a suitable re- "ducing agent, such for instance as alkaline -hydros ulfite, gives riseto a new compound which 1s the leuco compound of 2.2'-d1- methyl-.1.1-dianthraquinonylam1n.

My new compound is of use for the pro-,

duction -of pink shades onvegetable fiber,

foron being'applied to such, fiber it is fixed thereon and can then, be converted into'the originalcompound, giving rise to clear pink shades of excellent fastness.

. My new compound is characterized by be- .ing solublein caustic alkali solution, and

a-fter'having been applied to vegetable fiber and then converted into the original com-.

pound the shades thus obtained remain rac- "tically unaltered on being touched wit d1- lute caustic soda solution, or with sodium chloric acid, orwith dilute nitric aci but on being touched with alkaline hydrosulfite solution give rise to ayellowish brown spot.

The following examples will. serve to illustrate further the nature of my invention and how it can be carried into practicalefi'ect,

but-the invention is not limited to these exam les. i v

xample 1: Suspend sin kilograms of a ten per cent. paste of 2.2-d1methyl-1.l'-d1anthraquinonylami-n in one thousand liters of water, and add' two liters of a twenty-four h dro- Specification of Letters Patent. PatentedfSept. 13 Application filed June 9, I i

1910. Serial No. 565,93 8.

per cent. solution of caustic soda, twenty liters of a solution of hydrosulfite (containing one hundred and thirt grams of. sodium fliydrosulfiteand sixty cu ic centimeters of for every liter of water used), and forty kilograms of Glauber salt.- iVhen reduction is completefthe product contains my new compound in solution. In order to make use of it, introduce vegetablefiber into the vat;

and dry the goods.

wash, soap,

Examp e 2: Mix together one hundred rams of a ten per cent. paste of 2.2- cimethyl-Ll -dianthraquinonylamin, forty 'rams' of stannous oxid (in the form of a fifty per cent. paste), fifty grams-of glycerin, and 'eight'hundred and ten parts of alkaline thickening (prepared from three hundred andtwenty grams of a sixty per cent. dextrin' thickening, three hundred and forty grams of a fifty 'er cent. gum thickening, and one liter of orty-one per cent. caustic soda solution). Print this paste onto the goods, and dry the printed goods at a temperature of from forty, to fifty,- degrees centigrade, and then steam them for live minutes in a Mather-Plattapparatns, and

the operation, my new leuco compound is formedand is fixed on the fiber, and is sub sequentl converted intofthe original-2.2- dimethy -1.1.' -dianthraquinonylam1n.

Now what I claim is pound 'of- 2.2 dimethyl -"1.1 dianthraquinonylamin by treatingthe said 2.2 -dimethyl-1.1" dianthraquinonylamin with a suitable reducing agent, substantially as hereinbefore described. I a

.2. The process of producing a lenco compound 'of 2.2'-dimethyl-1.1'{dianthraquinonylamin by treating 'the said 2.2 dimethyl-1.1'-dianthraquinonylamin with alkaline hydrosulfite solution. I i 3. As anew article of manufacturea lcucocompound of 2.2. -dimethyl-1.1-dianthraquinonylamin. which new compound is soluble in -caustic alkali solution and on b ing applied to vegetable fiber and then converted into the original compound gives rise to twenty-four percent. caustic soda solution dyefor thirty minutes while cold, and then then wash and drythe said goods. During 1. The process of p'roducing a leuco com:

i on

clear pink shades of excellent fastness, the In testimony whereof I have hereunto set said shades remaining practically unaltered my hand in-thepresence of two'subscrib'ing 10 on1 being touchialdg zvdith dilute fiustic solola witnesses. v i

so ution, or wit s ium hypoc orite so uv tion, or with dilute hyd ochloric acid, or A FILIP KACER' with dilute nitric acid, but on being touched Witnesses:

with alkaline hydrosulfite solution give rise J. Anne. LLOYD,

to ayellowish brown spot. ERNEST L. Ivns. 

